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Questions tagged [clamp]

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How do you simulate a ferrite clamp in LT Spice?

Someone asked before how to get parameters for ferrite bead simulation. The same method doesn't really work for clamps because almost all of them don't give information about resistance. I began ...
Tony's user avatar
  • 187
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0 answers
47 views

Clamp meter and APC PDU amperage reading in disagreement by 3A -- how is this possible?

I have a cabinet of servers in a datacenter. The cabinet is powered by a 208V 30A 2-pole circuit with a L6-30R outlet. I plug my APC AP8941 power distribution unit into that outlet. I follow the 80% ...
Elliot B.'s user avatar
  • 103
2 votes
1 answer
132 views

Automotive MOSFET active clamping circuit - LC ringing between coil load and MOSFET gate?

I'm trying to design a circuit equivavlent to fully clamped automotive MOSFETs (like the STP62NS04Z) using discreet, cheap and readily available IRFZxx MOSFETS. The goal is to drive a high impedance ...
Ognjen Galić's user avatar
0 votes
0 answers
110 views

Need suggestion to replace the thermal fuse of a heater

I got a mal-functioned heater from a community group. After diagnosis, I found one of the thermal fuse was blown. I got the replacement fuse and now face the question of how to replace it. The ...
Jack Hwang's user avatar
6 votes
2 answers
1k views

Clamping diodes

I am trying to clamp a 100V sine wave into an approximately +/- 4V signal for measurement purposes (zero crossing detection). I have simulated a circuit with 4 diodes (4 times the forward voltage is ...
Ultra67's user avatar
  • 485
0 votes
1 answer
113 views

Phase shift in clamper circuit

I'm trying to simulate this clamper circuit in falstad: But there's a phase shift in the output voltage of my circuit. Is this expected? Am I doing something wrong? Can someone please explain? (I'm ...
Shub's user avatar
  • 129
1 vote
1 answer
132 views

What is this wire-to-board connector?

For my project I want to use the circuit board of a SRAM Eagle AXS controller. But I can’t figure out which kind of connectors they used for this. The male connector is 4 mm wide. Maybe someone has ...
iPopances's user avatar
1 vote
1 answer
76 views

Few hundred mV clamping

I have a signal that's output from a summing amplifier that can change between 200mV to 500mV. I would like to clamp this signal to 350 mV. That's to say that the output of clamping needs to vary as ...
EarthLord's user avatar
  • 597
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0 answers
267 views

Can a single CT Clamp go to 2 energy meters?

I have a Split Core CT CTSA016 - 100A/50mA Yuanxing CT Clamp (Datasheet) around my mains - and it is feeding into my Solar Inverter. I have just purchased a Shelly EM 2 Channel WiFi energy meter to be ...
RenegadeAndy's user avatar
0 votes
2 answers
92 views

Equivalent voltage source

I have the following circuit (see picture 1) where the switch \$ 0 - 1 - 2 \$ is in the "state" \$ 0 - 2\$. The values are \$ R_1 = 20~\Omega \$ , \$ R_2 = 30~\Omega \$, \$ R_3 = 10~\Omega \...
syphracos's user avatar
  • 167
3 votes
3 answers
1k views

How can I clamp the voltage precisely from the back EMF of a brushed DC motor?

I am using DRV8412DDWR in a medical product, where we are driving two DC motors (graphite brushed) bidirectional using PWM. In our application, we have to suddenly stop the motor. When we do that, we ...
Nice Guy's user avatar
0 votes
0 answers
134 views

Burning of Resistor in the Clamp Circuit of an SMPS

This circuit has been designed and optimised. When implementing on PCB R3 resistor is burning up. Any reasons or suggestions for this to happen? Circuit is stable and safe when supplied with 190V and ...
Bender's user avatar
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0 votes
0 answers
74 views

ESD Voltage for diode - Positive and negative transients

While selecting ESD protection diodes for, say, ethernet or usb datalines, we usually select the clamping voltage of the diode more than the working voltage of the signal lines and lesser than the ...
user avatar
0 votes
1 answer
174 views

How to clamp a non-inverting op-amp configuration

I want to clamp a signal to positive voltages. Below is shown how clamping works in an inverting configuration. Is it possible to clamp in a non-inverting configuration without using a second op-amp (...
Hansel's user avatar
  • 333
0 votes
1 answer
52 views

How to create an extensible electrical connection with a small form factor?

I have a hard time finding a product that suits my needs, and I am wondering if it exists. I would like to create electrical connections, eight times 100 VAC, i.e. 16 connectors, and I would like to ...
Thomas Hirsch's user avatar
3 votes
1 answer
676 views

Proper burden resistor CT clamp

I'm trying to figure out what the proper burden resistor I should use, but the information I'm reading from OpenEnergyMonitor answer for the proper resistor values doesn't match what I was expecting. ...
used_up_user's user avatar
-1 votes
1 answer
175 views

Why is the polarization of the capacitor flipped in this diagram?

As far as I know, the vertical line of the polar capacitor symbol represents the positive side. In this diagram, it is somehow is flipped. The output voltage does not make any sense to me, either.
Ghost's user avatar
  • 166
1 vote
2 answers
63 views

What device could be used to clamp a 0-10 VDC output from a pot to a lower VDC

We have an outdated machine where software along with most everything else, is obsolete. I am looking for a way, to take the 0-10 VDC output from a potentiometer, which is used as a reference for ...
cfetrow's user avatar
  • 11
0 votes
0 answers
123 views

EMC/EMI Testing EN61000-4-6 current clamp vs EM-clamp

I have a question regarding the Conducted Immunity Test (EN 61000-4-6) In the standard it is discussed that the preferred method for injection is CDN, but when that is not available one can choose ...
DRF's user avatar
  • 536
0 votes
1 answer
81 views

What should be the clamping voltage specification for selecting a ESD/TVS diode

I'd like to understand how to select a clamping protection device, say TVS/ESD diodes, for Ethernet/USB lines ? Like, what should be the current rating and the clamping voltage rating for the ESD ...
user avatar
11 votes
3 answers
411 views

How to avoid or compensate for reverse biased base-emitter breakdown in this BJT active clamp design?

This active clamp design is elegant and simple, and works well to prevent OUT from exceeding the supply voltage (+15V), but fails when IN is low enough to reverse bias Q1's base-emitter junction ...
Simon Fitch's user avatar
  • 38.9k
1 vote
0 answers
89 views

ACF flyback leakage inductor current problem

I try to use Basso's Free SIMPLIS document to run the active clamp flyback, and I try to use math to build the leakage indcuctor current waveform, but I got some problems. please see the below ...
Power JJ's user avatar
  • 357
3 votes
2 answers
4k views

Can I measure multiple wires (same current direction) with a clamp meter?

I have two wires that have current going in the same direction. Can I put them both between the clamps of a current meter and read the sum? Edit: I should mention that both wires carry DC current, and ...
FlakR's user avatar
  • 749
0 votes
0 answers
623 views

Implementing A/D conversion circuit to a DIY clamp meter

I was looking for cheap clamp meter projects and found this one: DC non invasive current clamp for oscilloscope DIY. After reading about this project, I noticed that it had a BNC output to read values ...
Jjeico's user avatar
  • 141
0 votes
1 answer
99 views

Finding DC saturation behavior of clamp ferrites

While some chip ferrite datasheets specify maximum current and DC saturation behavior, it seems like many clamp ferrites omit both maximum current specification (which arguably is less critical) but ...
NoobPointerException's user avatar
0 votes
1 answer
251 views

Clamp output voltage from DAC

Hi all my analog friends! I have what is probably a very simple problem and I am just overthinking it--but when I work in the analog world, I always feel like I'm missing something. My problem is ...
Catwoman's user avatar
4 votes
1 answer
650 views

Is AC current clamp meter accuracy affected by the inner wire curving around the outside?

I have a SCT013-030 current clamp sensor I plan to use to read out the power usage of a mains AC load. It works by wrapping around one of the AC strands of wire to measure the magnetic field. The one ...
bergerkiller's user avatar
1 vote
1 answer
267 views

Working of a clamper circuit

I was reading about the clamper circuit on wikipedia and found this below image for a positive clamper circuit. My question is During the positive (Rising/increasing portion) half of the input AC ...
user avatar
0 votes
3 answers
718 views

How to prevent voltage spike on Arduino digital pin?

I'm trying to read the state of a switch with an Arduino. The switch is being pushed each time a garage door opens or closes, and is located about 2 meters away from the Arduino. The cables connecting ...
Marlon's user avatar
  • 33
1 vote
1 answer
163 views

What are the disadvantages of using an adder instead of a clamper?

I must use an offset an AC signal to measure through ADC. The traditional way or most of the resources point me to use the following clamper circuit: However, I also see that the following adder ...
SKGadi's user avatar
  • 862
1 vote
3 answers
2k views

Generating a reference voltage of 1.65V (half of 3.3V)

I am trying to measure an AC voltage using an ADC. However, the ADCs I know only measure the positive voltage. Hence, I am thinking of converting the AD to DC with an offset using the following ...
SKGadi's user avatar
  • 862
0 votes
1 answer
199 views

clamping the amplitude of a wave to certain level

I'm trying to prevent a wave form from exceeding 10V.p.p. I tried various things, but ... what the correct way to do it? this clamps a 11V signal to +/- 900 mV ... and converts a triangle to square. ...
NaturalDemon's user avatar
0 votes
1 answer
648 views

Choosing the clamp capacitor of active clamp forward

Does anyone know how to choose the Ccl value? Could you give me some suggestions? I read these Onsemi and TI documents. The formula of Ccl are the same. I have some question about these two ...
Jitter456's user avatar
  • 575
7 votes
8 answers
3k views

Can I build, or is there such a thing as an AC clamp multimeter which does NOT require a line splitter?

I am not an electrician. I need to verify the power consumption (watts) of some home equipment (on 120V or 220V) without disconnecting them or splicing the wires. I would love to be able to walk to ...
Vincent S. Cojot's user avatar
0 votes
1 answer
138 views

Connect 2mm copper wires electrically for 36kHz

I want to build a indoor non-moving Faraday cage against 36kHz electric fields with a 2mm diameter copper wire. I will have several T-junctions where there is a running wire and an end of a wire comes ...
Hansebenger's user avatar
3 votes
1 answer
519 views

Clamp meter readings

I have a Uni-t UT210e clamp meter. I noticed that when measuring AC current, the reading varies if I move the wire inside the clamp. The measured value displayed on the meter is higher when the wire ...
beard999's user avatar
  • 343
-1 votes
1 answer
135 views

How to build an "instantaneous" clamper circuit [closed]

I am asked to clamp a signal 5sin(ωt) V with frequency of 1 kHz to a DC level of 2 V and -4 V. I already built circuits that can do that. But my professor says that the graphs should be exactly like ...
Daniel Melo Avila's user avatar
1 vote
3 answers
132 views

TVS with low Vclamp margin

Thanks for your support in this forum. Currently I have a couple of PCB that I need to provide a double input power supply and transient protection. The specs for this couple of PCB are Vin= 9 to 17....
Jordi NC's user avatar
0 votes
2 answers
688 views

How do I create a secure clamping circuit?

Clamping is good for transients, e.g voltage peaks. But two issues with clamping is that if you have a linear voltage regulator attached to 3.3v and 3.3v is the voltage regulator output, then that ...
euraad's user avatar
  • 1,324
2 votes
2 answers
638 views

Understanding input bias current in operational amplifier

In order to prevent overvoltages on my arduino voltmeter (more than 20v) I decide to add a protection circuit. As i show in the image i use a AD8605 precision op-amp for the purpose. (https://www....
marcosbc's user avatar
  • 450
3 votes
3 answers
3k views

Measuring RMS power output from audio amplifier channel

I am looking for a simple way for getting the RMS power output of an amplifier channel set to some arbitrary gain. I want this in order to find the maximum level I can safely set the amplifier at for ...
user2418372's user avatar
1 vote
1 answer
484 views

Clamper Circuit Without A Resistor Analysis

simulate this circuit – Schematic created using CircuitLab We were given this clamping circuit and were tasked to plot Vc and Vout for varying input. The only given quantities are the forward ...
user avatar
-1 votes
2 answers
78 views

What's the official name for this metal glue clamp for internal wires?

I'm tasked with making a few new pieces of eqipment based on an existing one. This piece uses a few clamps like below to hold wires (usually a few at a time) connecting individual components inside ...
ivan_pozdeev's user avatar
1 vote
1 answer
1k views

RCD "Clamp/Snubber"

I am attempting to figure out this "RCD Snubber" as seen below: The Eval Sheet says "The resistor capacitor diode (RCD) snubber for the two synchronous rectifiers consists of R3, C29, and D4 for one ...
Carlo's user avatar
  • 43
0 votes
2 answers
206 views

Identify the Maximum ESD Clamp Voltage on a circuit

This is with regard to a series of my ESD and Inrush Related questions. My circuit : The Node A goes to two other circuits like below : AND Now, I apply an ESD pulse of say 8kV/330pF, the ...
user avatar
1 vote
3 answers
2k views

Precision voltage clamping 0V to +5V with +/-12V input

I'm looking for an opamp "voltage clamping" circuit with a +/-12V input and a 0/+5V output. I mean : When input < 0V = output stays at 0V When 0V < input < +5V = output 0 to +5V When input > ...
Synthlink's user avatar
1 vote
2 answers
1k views

Clamping circuit output dependence on load resistance

I constructed an unbiased positive clamping circuit with C1 capacitor = 1 uF and load resistances R1 of 100 Ω or 100 kΩ. The ...
Sudipta Nayak's user avatar
0 votes
2 answers
692 views

How to clamp opamp output to +-12v when supply is +-15v

I have the following circuit. It's purpose is to take a 0-3.3v signal from an MCU and provide a square, -12v to 12v wave across R3, R4 and either R5 or R6. The idea is to read +-9v when only R4 is ...
Matthew Goulart's user avatar
1 vote
2 answers
436 views

Multi-Conductor DC Clamp Meter

Does a multi-conductor DC clamp meter exist? Possibly using hall effect sensors in a specific orientation? I typically work with 24-28V DC solenoids valves & pressure transducers with 2 and 4-...
Karl Parks's user avatar
0 votes
1 answer
59 views

Proper way of connecting wires to pins on polymer films

What is the proper way to connect wires to contacts from a thin semitransparent "plastic" foil (see images). There are slightly different types; the first one with the 4 pins in a row is the more ...
Martin's user avatar
  • 203